Eaton PowerXL Series - Table 14. Request to Read Exception Status; Table 15. Read Diagnostics; Table 16. Request to Write Single Coil; Table 17. Request to Write Single Register

11
Modbus RTU On-Board Communications
POWERXL SERIES VFD MN040010EN—June 2018 www.eaton.com
Example of the request to read exception status from Slave
device 18.
Table 14. Request to read exception status
Item Code Description
Slave address 0x12
Function code 0x07
CRC High 4C
CRC Low D2
Example of Read Diagnostics from Slave address 18.
Table 15. Read diagnostics
Item Code Description
Slave address 0x12
Function code 0x08
Sub function High 0x00
Sub function code 0x0000 (= 0)
Sub function Low 0x00
Note. Only support sub function code
0x0000
Data High 0xA5
Data 0xA5A5 (= 42405)
Data Low 0xA5
CRC High 0x59
CRC Low 0x83
Example of the request to write single coil 2000 from slave
device 18, the output value is 65280.
Table 16. Request to write single coil
Item Code Description
Slave address 0x12
Function code 0x05
Output address High 0x07
Starting address 0x07D0 hex (= 2000)
Output address Low 0xD0
Output value High 0xFF
Output value 0xFF00 hex (= 65280)
Output value Low 0x00
Note. Output value is 0x0000 or 0xFF00
CRC High 0x8E
CRC Low 0x14
Example of the request to write single register 2000 from
Slave device 18, the output value is 5.
Table 17. Request to write single register
Item Code Description
Slave address 0x12
Function code 0x06
Output address High 0x07
Starting address 0x07D0 hex (= 2000)
Output address Low 0xD0
Output value High 0x00
Output value 0x0005 hex (= 5)
Output value Low 0x05
CRC High 0x4B
CRC Low 0xE7
Example of Write coils 19–28 from Slave device 18.
Table 18. Write coils 19–28
Item Code Description
Slave Address 0x12
Function code 0x0F
Starting Address High 0x00
Starting Address 0x0013 (= 19)
Starting Address Low 0x13
Quantity of Outputs High 0x00
Quantity of Outputs 0x000A (= 10)
Quantity of Outputs Low 0x0A
Bye Count 0x02
Outputs Value High 0xCD
Outputs Value Low 0x01
CRC High 0xAB
CRC Low 0xFB
ote: N The binary outputs in the previous example corre-
spond to the outputs in the following way.
Binary bits and corresponding outputs
Bit 1
10011010000001
Output 26
2524 23222120 19—————2827
Example of write Holding registers 2000-2001 from Slave
device 18.
Table 19. Request to write holding registers
Item Code Description
Slave Address 0x12
Function code 0x10
Starting Address High 0x07
Starting Address 0x07D0 (= 2000)
Starting Address Low 0xD0
Quantity of Outputs High 0x00
Quantity of Outputs 0x0002 (= 2)
Quantity of Outputs Low 0x02
Bye Count 0x04
Outputs Value High 0x00
Outputs Value Low 0x01
Outputs Value High 0x00
Outputs Value Low 0x02
CRC High 0x53
CRC Low 0x46